radium sulfate

noun

, Chemistry.

1. a white, crystalline, water-insoluble, poisonous, radioactive solid, RaSO 4 , used chiefly in radiotherapy.

Word History and Origins

Origin of radium sulfate¹

First recorded in 1970–75

Example Sentences

As Willis’s blog explains, the device’s radioactivity comes from tiny pieces of paper “uniformly loaded with radium sulfate.”

From Washington Post